Plastic and nonmetallic article shaping or treating: processes – Shaping or treating radioactive material
Patent
1979-09-13
1981-06-02
Sebastian, Leland A.
Plastic and nonmetallic article shaping or treating: processes
Shaping or treating radioactive material
G21C 2100
Patent
active
042711010
ABSTRACT:
Nearly isotropic spherical fuel elements of high strength and high heavy metal content for gas cooled high temperature reactors consisting of a fissile and fertile fuel material containing nucleus and a fuel free shell are prepared by preliminarily compressing a molding powder consisting of a mixture of natural graphite and binder resin, synthetic graphite and binder resin or a mixture of both types of graphite powder and binder resin together with coated fissile and/or fertile fuel material particles with addition of a lubricant in a rubber mold with an ellipsoidally shaped cavity at low molding pressure three dimensionally to preform the nucleus of the fuel element, shaping the preformed nucleus into the required molding powder for the shell in a second rubber mold with ellipsoidally shaped cavity, preliminarily compressing this fuel element compact and subsequently final pressing and heat treating at up to about 2000.degree. C., the shaped fuel element in the rubber mold at a pressure of less than 200 kg/cm.sup.2 being precompressed three dimensionally to such an extent that the green graphite matrix of the so formed ellipsoidal compact has a density value of more than 65% of the theoretical green density and subsequently final pressing in a single dimension the preliminarily compressed fuel element body in a steel die between two cup shaped metal dies in the plastic temperature range of the binder resin at a pressure of less than 200 kp/cm.sup.2 to densities of more than 95% of the theoretical density of the green graphite matrix.
REFERENCES:
patent: 3912798 (1975-10-01), Rachor et al.
patent: 3975471 (1976-08-01), Hrovat et al.
patent: 4017567 (1977-04-01), Hrovat et al.
Hrovat Milan
Spener Gerhard
Hobeg Hochtemperaturreaktor-Brennelement GmbH
Sebastian Leland A.
LandOfFree
Process for the production of spherical-shaped fuel elements for does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with Process for the production of spherical-shaped fuel elements for, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Process for the production of spherical-shaped fuel elements for will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-1864618